Hi, I have a data.table question (as well as if else statement query).
I have a large list of families (file has 935 individuals that are sorted by famiy of varying sizes). At the moment the file has the columns: SampleID FamilyID Relationship To prevent from having to make a pedigree file by hand - ie adding a PaternalID and a MaternalID one by one I want to try write a script that will quickly do this for me (I eventually want to run this through a program such as plink) Is there a way to use data.table (maybe in conjucntion with ifelse to do this effectively)? An example of the file is something like: Family.ID Sample.ID Relationship 14 62 sibling 14 94 father 14 63 sibling 14 59 mother 17 6004 father 17 6003 mother 17 6005 sibling 17 368 sibling 130 202 mother 130 203 father 130 204 sibling 130 205 sibling 130 206 sibling 222 9 mother 222 45 sibling 222 34 sibling 222 10 sibling 222 11 sibling 222 18 father But the goal is to have a file like this: Family.ID Sample.ID Relationship PID MID 14 62 sibling 94 59 14 94 father 0 0 14 63 sibling 94 59 14 59 mother 0 0 17 6004 father 0 0 17 6003 mother 0 0 17 6005 sibling 6004 6003 17 368 sibling 6004 6003 130 202 mother 0 0 130 203 father 0 0 130 204 sibling 203 202 130 205 sibling 203 202 130 206 sibling 203 202 222 9 mother 0 0 222 45 sibling 18 9 222 34 sibling 18 9 222 10 sibling 18 9 222 11 sibling 18 9 222 18 father 0 0 I've tried searches for this but with no luck. Greatly appreciate any help - even if its just a link to a great example/solution! Thanks! ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
